1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a3633c9216f9385a215b20064dd06747ed44a85992e0b41e26b6e4f9c467ea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/615f7e8e-bacf-4cbc-81c4-3064e2fa34d2.json and https://artists.proofprofile.net/proofs/artist/615f7e8e-bacf-4cbc-81c4-3064e2fa34d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b3df91f3abcc32e77f4a3f604b287a5ad79ea13840fd818a94749f7061c2df. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZJG51942043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc715551590d046633ffb6aa0585041e69c7b0dca30248097793cf75eab1495. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZJG51989981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586e7abb4fea871cec3200c2b566992122fd148efffc524e1ea2c70c7158c40b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ85M2037664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca854fd207298dc06fede0d2676a1fdbedcb33d5b29ad12147d610822c9c3466. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ85M2063159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82be4b7642dd0bdd7d601525ebeb5ccc3fea30d4fbc0089c5e79a7063633bde. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNB82052604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64fe44cdf5f237b6aa7e11b410d43fd3529cde364692142cb7f859ae5d5a0a9. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2277884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7507ec96075b6e267b427944f23fdaaf0dee379d4d28977c9653dcb1dfb7e51e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2277886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab67199fe92ec995d63371e6828d7a2c3edd619b48021f6ac248b4cb84b3f56. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2277887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c531bf700e648be9da0802fbcc7a0f013beae0dac2e0682f18ff5716ec8c0c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2277890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae117aba5556bf361d62d427540267c71c7ed04bc353de4c65c3965d6794c0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2277894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa428fbc7b7654559c11670ec0d6d5c210db561198acdfbea3c17e5459002bbb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2277895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182819cba4dc4aaa0ff640c3c2d4d6db299f81ab4e71dac22a538b605e13b46. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMZ2249673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaee92562cdfb5f7f4ec938ae9e7b7980b19cdd61dfe4b1447dbbd101550f4d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMWW2100828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52814af85f830c3055265f3c88d127e8db72fcaa5ac10714982a6d13f45a7179. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZL382493134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf255f3fc1aa4775822d5f98dd7d97993499aea7a203e2f596a187ac85b51c5bf. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNB82438648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280cd3f91bd97a873e4836c1e493d4954c39f0175bab68404d8f7201237cc447. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNB82451317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84370f2b07e397b1b4a7b33a736efdc5b578ad9d7c475cfc175c1bdc786a3268. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2442128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7fe0898d3f402d3595acd300119d1d963ad8d1a5b8777604f0c1c30f2157a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMU2449704.
Living In The Country (Want It That Way)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89343f938bd9e6535acb6daf6ccaa5ed92c502cd3edf6a29be8ba7e332167be4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMV2449969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77368c1ef478bf89749eff4d3693467dde3151e328a4162e9c9f9f080dd4682b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMV2449968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfd726577de796e04cc60410dc1ed9aa8e796850fd1dff9aac9ebe928affa77. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMV2449970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfad51fbfab9d4a0cfaa47d46beb98929ddc0089a6aaae7aee99c14a227caad. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMV2449971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a02a3c89750a27d412f7ee6e866e122e82f9f67bdaa3bb4341abf0e27e1bdd. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZLL92486134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4aaf44ea6b1f9405f70fb80323e739a590b570d305deb196df25fe26defd0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMV2449972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf3a23c843f589f14b5fee397b85377c533a2a71dbb01a634b2cc062f846800. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLD91781651.